The arc quenching Magnum DS switchgear detects and extinguishes an arc flash in less than ms to dramatically reduce incident energyIt reacts x faster than systems that rely solely on circuit breakers to clear an arc fault, including maintenance switches, ZSI, bus differential relaying and arc detection relays.
Arc flash prediction and detection in MV LV switchgear (photo credit ) Along with detection of phase o overcurrent, zero sequence overcurrent detection can also be applied to indicate phase to ground faultsFigure (a) illustrates the basic operation principle of light and overcurrent based protection.
Switchgear certified as arc resistant is designed to safely contain and redirect arc flash energy away from the operatorThis is typically accomplished by diverting arc flash energy through a plenum to an area it can be released without danger of harm to personnel or equipment.
switchgear interrupting medium from to kV Non flammable Arc quenching Non toxic Inert Odourless Highly stable gas Heavy gas Two different types of arc control device, both relying on extending and cooling the arc Puffer Rotating arc
Arc flash over current sensors Switchgear standard current sensors provide actual current informationNormal over current or bus differential protection systems can be used to clear arc faultsThe time required for the detection and interrupting of an arcing fault using modern relaying and state of the art circuit breakers is a minimum of
SEL The SEL Arc Flash Test Module provides a convenient way to test the operation of arc flash detection relays installed in metal clad and metal enclosed switchgearThe SEL is used to test the SEL , SEL and SEL A relays and other arc flash detection relays that use light and overcurrent to sense an arc flash event.
Arc flash analysis has been performed for this site (calculations, labeling and Arc flash hazard analysisarc flash boundaries)Electrical safety training for operators and maintenance personnelArc flash hazard training for operators and maintenance personnelArc flash hazard training focusing on selecting and using the proper PPE.
Arc flash protective relays Light emitted by the arc can be used to detect an arcing fault instead of current sensingThis is the principle of operation of arc flash protective relays now being marketed by some companies in the U.SThe result is the same as that of the maintenance switch except that no human action is necessary.